If you go back a few updates (probably quite a few updates), there was a time where that was true. Sex with a Taur was more 'realistic' and your options were limited in sex. There was no 'fondle their naughty bits you while you bang them' options, it was pretty much click the 'fuck' button and that was it and apparently people were complaining about it.
So, sometime later Innoxia changed it so that as a Taur, you could go into pretty much any position, with anyone, and 'physics' be damned. It seemed that, enough people just didn't care about 'realistic', they just knew they couldn't play out their sexy Taur fantasies they way they envisioned it (or felt Taur sex was boring) and wanted to 69, or cowgirl, or mating press, or back to the wall sex a Taur (or as a Taur) and realistic be damned.
What's funny to me, is that the Centaurs (and taurs in general) were only meant to be a placeholder thing in the city, more of a preview of things to come, because Folio Fields was 'just around the corner' and Inno wanted to give people a sneak peek of things to come. That was 2 something years ago, or so, now they are an integral part of the city.